Pseudoscience

Pseudoscience is any body of knowledge, methodology, or practice that is erroneously regarded as scientific {{mn|dicdef|1}}.

Pseudomathematics

Pseudomathematics is a form of mathematics-like activity undertaken by many non-mathematicians - and occasionally by mathematicians themselves. The efforts of pseudomathematicians divide into three categories:

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• attempting apparently simple classical problems long proved impossible by mainstream mathematics; trying metaphorically or (quite often) literally to square the circle
• generating whole new theories of mathematics or logic from scratch
• attempting hard problems in mathematics (the Goldbach conjecture comes to mind) using only high-school mathematical knowledge